com.caucho.filters
Class TransactionFilter

java.lang.Object
  com.caucho.filters.TransactionFilter

All Implemented Interfaces:

Filter

public class TransactionFilter
extends java.lang.Object
implements Filter

Wraps the request in a transaction. All database calls for the request will either succeed together or fail.

Since:

Resin 2.0.5

Constructor Summary

TransactionFilter()

Method Summary

void	destroy() Any cleanup for the filter.
void	doFilter(ServletRequest request, ServletResponse response, FilterChain nextFilter) Wrap the request in a transaction.
void	init(FilterConfig config) Lookup java:comp/UserTransaction and cache the results.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TransactionFilter

public TransactionFilter()

Method Detail

init

public void init(FilterConfig config)
          throws ServletException

Lookup java:comp/UserTransaction and cache the results.

Specified by:

init in interface Filter

Throws:

ServletException

doFilter

public void doFilter(ServletRequest request,
                     ServletResponse response,
                     FilterChain nextFilter)
              throws ServletException,
                     java.io.IOException

Wrap the request in a transaction. If the request returns normally, the transaction will commit. If an exception is thrown it will rollback.

Specified by:

doFilter in interface Filter

Parameters:

request - the servlet request

response - the servlet response

nextFilter - the next filter in the chain

Throws:

ServletException

java.io.IOException

destroy

public void destroy()

Any cleanup for the filter.

Specified by:

destroy in interface Filter